Seats, General Information

P4 DM Ch10; CasGen5 DM Ch7

Unless otherwise noted, all seat adjustments should be made while seated and before the engine is started.

Due to the maximum adjustability of mid- and high-back air suspension seats, it is possible to combine the seat back recline adjustment and the seat slide adjustment so that the seat back contacts the backwall. It is the responsibility of the driver to adjust the seat to prevent damage to the seat and the cab interior.

Warning: Keep hands, tools, and other objects away from the scissor points under the seats. Failure to do so could cause personal injury.

The following is a description of adjustments that can be made to various Freightliner-installed seats. Not all seats have all of the adjustments listed below. See Fig. .

  1. Backrest Tilt

  2. Lumbar Support

  3. Isolator Feature

  4. Height Adjustment

  5. Bottom Cushion Angle (fore-and-aft cushion height)

  6. Fore-and-Aft Seat Slide (seat track adjustment)

  7. Seat Tilt

  8. Headrest Adjustment

Fig. 1, General Seat Adjustments

  1. Backrest Tilt: This adjustment enables the backrest to pivot forward or backward.
  2. Lumbar Support: Lumbar support changes the shape of the seat back to give more or less support to the occupant's lumbar (lower back) area. This adjustment is either mechanical or air controlled, depending on make and model of the seat.
  3. Isolator: This feature reduces the amount of road shock by isolating the occupant from the motion of the vehicle, and allowing the upper seat to move in a simple pendulum motion. A lockout feature is used whenever the isolator is not desired.
  4. Height Adjustment: This adjustment moves the entire seat up or down. The adjustment is either manual or air-controlled, depending on the make of the seat.
  5. Bottom Cushion Angle, or Fore-and-Aft Bottom Cushion Height: This adjustment enables the occupant to raise or lower the front or back of the bottom cushion. This adjustment is easier to perform when all weight is removed from the seat.
  6. Fore-and-Aft Seat Slide, or Seat Track Adjustment: This adjustment moves the entire seat forward or backward on its track.
  7. Seat Tilt: This adjustment allows the seat assembly (back and bottom cushions) to tilt forward or backward.
  8. Headrest Adjustment: This adjustment changes the angle of the upper part of the backrest to provide head and upper back support.
Note:
Parent topic: Seats and Restraints
Document Number: 0000117180
Manual Publication Date: 2024-05-13
Topic Publication Date: 2025-01-13